59811:666 => /24 = only send to Voxility
             /32 = announce to RTBH on ixs/upstreams/UTRS
65535:666 => COMMUNITY-AS59811-BLACKHOLE

59811:6500x => originated from site
          |
          x => 0 = all
               1 = TN2
               2 = LD5
               3 = MA1
               4 = PUE

650xy:zzzzz
   ||||
   x => 0 = all
    | | 1 = TN2
    | | 2 = LD5
    | | 3 = MA1
    | | 4 = PUE
    | |
    y => 0 = no-announce
      |  1 = prepend 1
      |  2 = prepend 2
      |  3 = prepend 3
      |  9 = no-export
      |
      zzzzz => 0 = any peer/upstream/downstream
               1299 = Arelion
               2914 = NTT
               3223 = Voxility (NB see also 59811:666)
               6762 = TISparkle
               65511 = Tampnet (would be 200781)
       
               65521 = LON1
               65522 = LON2
               65523 = LINX Manchester
               65524 = LINX Scotland
               65525 = LONAP



LOCAL PREFERENCES

100 => transit (de-pref)
200 => transit
300 => transit (up-pref)

400 => peering (de-pref)
500 => peering
600 => peering (up-pref)

700 => downstream (de-pref)
800 => downstream
900 => downstream (up-pref)